My Photoshop window moves to about 1/3 of the way down the screen randomly. I have maximized the window, moved it back to the top, but sooner or later, it will move to about 1/3 down the page. I can't find any settings in Photoshop or in Mac Preferences that would cause this. I have tried double clicking the window bar and it goes back to the top and fills the screen, but not permanently; eventually it goes back down. I have turned the Mac Preference for double clicking on and off without any changes happening. This is fairly recent behavior, over the least week or so.